Can anyone out there tell me how to install the throttle arm on the new straight shot carb setup? Mine didn't come with the paper telling how to remove the stock metal throttle arm and install the new plastic arm. Any help is appreciated! THANKS!!!

This can be done on all carbs/engines with Walbro carbs:

Take the carb from the engine to keep dirt and shavings from ruining the innards.

Using a grinding stone on a Dremel or other high speed motor tool, grind away the part of the shaft that sticks through the arm. It will grind off easily since the shaft is brass or other soft metal and the arm is steel.

Using a pair of pliers and a twisting motion, twist the arm from the shaft.

Keep the coil spring on the shaft but you don't have to install it to return the throttle arm to low power. It is used just to tension the side-to-side motion of the shaft.

Mount the new plastic arm (it looks like a nose wheel steering arm) on the shaft with the socket head screw, adjust for complete throw, install a clevis or other pushrod fastner and you're on the way.

This method can also be used to replace the choke arm on carbs that are so equipped.

The job sounds difficult but you can do it in the time it took to read this page!

Thanks Dick for the help. I kind of figured that was the way that you might have to do but wasn't quite sure. I'd really hate to ruin a brand new engine or in this case the carb over my own ignorance of how to do it. I'll give it a try and thanks for your help. Also keep up the great work in R/C Report as I always enjoy reading your articles every month. Thanks Again!